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- static void Main()
- {
- int number = int.Parse(Console.ReadLine());
- int zeroCount = 0;
- int d;
- for (int i = 5; i <= number; i += 5)
- {
- d = i;
- while (d % 5 == 0)
- {
- d /= 5;
- zeroCount++;
- }
- }
- Console.WriteLine(zeroCount);
- }
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